Touya Mochizuki grows accustomed to his new life in another world. Armed with his trusty smartphone, the teenager accepts small quests at his leisure while spending time with his new fiancées: Yumina Urnea Belfast, Yae Kokonoe, and twin sisters Linse and Elze Shileska. But even in a relaxing environment, Touya is only beginning to understand the responsibilities that come with these engagements. In addition to his romantic woes, the elder fairy Lean wishes to locate the remaining pieces of Babylon, the floating island that the mysterious Professor Regina Babylon created five thousand years ago. Touya reluctantly accepts her request and seeks out the teleportation circles that will lead to the islands. However, strange monsters have emerged—possibly powerful enough to destroy the world. In order to save the second life he was given, Touya must weaponize ancient technologies to fight these monsters—all while balancing his overwhelming number of relationships.

The story follows the adventures of rabbit-shaped Jewelpet Ruby, her long-best human friend Airi Kirara and the other Jewelpets on their mission to restore the Jewel Castle, which had fallen from the skies into the middle of the town because of humanity's lack of faith in magic. To restore people's belief in magic, Jewelpets transform into humans to study more about them. (Source: ANN, edited)

In Jewel Land, Jewelpets, creatures who has the natural ability to use magic lived in harmony with the Witches, attending the School of Witchcraft and Wizardry to learn to use magic with their Jewel Eyes. However for Ruby, a white Japanese Hare whose magic sometimes fail, is appointed to go to the Human World to search for her partner. But when she used the card the magicians gave her, she was sent to the Human World by accident. In the Human World, A girl named Akari Sakura met her on the beach on her way to school. At first, Akari can't understand her due to her Jewel Land Language until Ruby took a special candy so she could speak and understand human language. As the day passes, Ruby knew about her problems and later apologized. A Jewel Charm appeared on Akari's hand and she realized it that she's chosen by Ruby to be her partner. After that, she decided to enter the Jewel Star Grand Prix, on the prize is that any wish that they wanted will be granted. Will she be the Next Jewel Star and her wish be granted in the end? Or It'll just end in one big disaster... (Source: Wikipedia)

One day after school, Asahi Kuromine stumbles upon the truth that Youko Shiragami, the girl he has a crush on, is actually a vampire. According to her father's rules, Youko must now quit school in order to keep her family safe. However, Asahi does not want her to go and promises that he will keep her true nature secret. Unfortunately, this turns out to be easier said than done, as Asahi is a man who is easy to read and is unable to keep any secrets to himself. And this is only the beginning of his troubles—more supernatural beings enter his life, and he is forced to protect all of their identities or face the consequences. Jitsu wa Watashi wa follows Asahi as he deals with his new friends and the unique challenges they bring, struggles to keep his mouth shut, and desperately tries to win Youko's heart in the process.